We might here take occaſion to ad
mire, that though Water (as appear'd by
the Experiment formerly mention'd of
the Pewter Veſſel) ſeems not capable of
any conſiderable condenſation, and ſeems
not to have interſperſ'd in it any ſtore of
Air; yet Quick-ſilver, of no greater bulk
then Water, ſhould weigh near fourteen
times as much. But having onely point
ed at this as a thing worthy of conſidera
tion, we will proceed in our inquiry after
the heigth of the Atmoſphere: And to
avoid the trouble of Fractions, we will
aſſume that Quick-ſilver is fourteen times
as heavy as Water, ſince it wants ſo little
of being ſo.
mire, that though Water (as appear'd by
the Experiment formerly mention'd of
the Pewter Veſſel) ſeems not capable of
any conſiderable condenſation, and ſeems
not to have interſperſ'd in it any ſtore of
Air; yet Quick-ſilver, of no greater bulk
then Water, ſhould weigh near fourteen
times as much. But having onely point
ed at this as a thing worthy of conſidera
tion, we will proceed in our inquiry after
the heigth of the Atmoſphere: And to
avoid the trouble of Fractions, we will
aſſume that Quick-ſilver is fourteen times
as heavy as Water, ſince it wants ſo little
of being ſo.
Wherefore having now given us the
proportion of Air to Water, and Water
to Quick-ſilver, it will be very eaſie to
finde the proportion betwixt Air and
Quick-ſilver, in caſe we will ſuppoſe the
Atmoſphere to be uniformly of ſuch a
conſiſtence as the Air we weighed here
below. For ſince our Engine hath ſuffi
ciently manifeſted that 'tis the Æquili
brium with the external Air, that in the
Torricellian Experiment keeps the Quick
ſilver from ſubſiding; And ſince, by our
accurate Experiment formerly mention'd,
proportion of Air to Water, and Water
to Quick-ſilver, it will be very eaſie to
finde the proportion betwixt Air and
Quick-ſilver, in caſe we will ſuppoſe the
Atmoſphere to be uniformly of ſuch a
conſiſtence as the Air we weighed here
below. For ſince our Engine hath ſuffi
ciently manifeſted that 'tis the Æquili
brium with the external Air, that in the
Torricellian Experiment keeps the Quick
ſilver from ſubſiding; And ſince, by our
accurate Experiment formerly mention'd,